The US has since gotten bad at dealing with companies like this. A company like Google or Amazon could/should be broken up into a few parts and would likely result in those parts together being worth more than when it was just the one company, and more competition in each industry.
Too early and the break-up can kill innovation. Too late and the company will have been a rent-seeking operation for so long that it chokes out dynamism.
It might be too early for OpenAI, but we shouldn't wait until they own all of the next Internet in the way Facebook, Google and Amazon ended up.